Section 20.1- Insect Anatomy and Physiology

Question 1

the largest and most diverse group of animals

Answer 1

invertebrates

Question 2

invertebrates with jointed appendages, make up more than three fourths of all species in the animal kingdom and include such familiar creatures as insects, spiders, crayfish, centipedes, and millipedes

Answer 2

arthropods

Question 3

in place of an internal backbone, arthropods have a strong, lightweight and flexible

Answer 3

exoskeleton

Question 4

a substance that is chemically similar to cellulose or starch that composes the exoskeleton of an arthropod

Answer 4

chitin

Question 5

all arthropods have…

Answer 5

1. jointed legs
2. segmented body

Question 6

form the largest class in the animal kingdom

Answer 6

insects

Question 7

include spiders, scorpions, mites, and ticks

Answer 7

arachnids

Question 8

consist of creatures with numerous body segments and legs

Answer 8

centipedes
millipedes

Question 9

include crayfish, lobsters, crabs, shrimp

Answer 9

crustaceans

Question 10

the most varied and numerous of all God’s living creatures

make up more than 70% of all animal species

Answer 10

insects

Question 11

scientists who study insects

Answer 11

enotmologists

Question 12

all insects have an exoskeleton that is divided into three distinct body regions:

Answer 12

head
thorax
abdomen

Question 13

all insects have a single pair of

Answer 13

antennae

Question 14

as adults, all insects have both ______________________ and ____________________

Answer 14

compound eyes
simple eyes

Question 15

all insects breathe through breathing tubes called

Answer 15

trachae

Question 16

all insects have _____________ pairs of jointed legs

Answer 16

3

Question 17

most insects begin life as an

Answer 17

egg

Question 18

process by which insects mature

may be complete or incomplete

Answer 18

metamorphosis

Question 19

metamorphosis in which the insect begins life as an egg that hatches into a nymph

Answer 19

incomplete metamorphosis

Question 20

an immature form the insect that looks much like the adult but has different body proportions

Answer 20

nymph

Question 21

metamorphosis in which the egg develops into larva

Answer 21

complete metamorphosis

Question 22

a wormlike eating and growing stage

Answer 22

larva

Question 23

coccoon or chrysalis stage of complete metamorphosis

after larva

Answer 23

pupa

Question 24

two of the most familiar insects that undergo complete metamorphosis are

Answer 24

monarch butterfly
cecropia moth

Question 25

complete cycle of incomplete metamorphosis

Answer 25

egg nymph molts adult

Question 26

complete cycle of complete metamorphosis

Answer 26

egg larva pupa adult

Question 27

common names for insects in larva stage

Answer 27

grubs maggot wigglers caterpillars

Question 28

one of the most common and familiar insects

Answer 28

grasshopper

Question 29

the front segment of the grasshopper

Answer 29

head

Question 30

part of grasshopper that can detect only light and shadow

Answer 30

simple eyes

Question 31

eyes that are sensitive to shape, color, and movement

Answer 31

compound eyes

Question 32

a small mass of nerve tissue located in the insect's head

Answer 32

brain

Question 33

the components of an insect's mouth are

Answer 33

mouthparts

Question 34

the specially designed chewing mouthparts of a grasshopper's mouth are teh

Answer 34

labrum and labium (form upper and lower lips) mandibles and maxillae (jaws)

Question 35

a fingerlike organ on the labium and each maxillae that may also taste plants to see if they are suitable for consumption

Answer 35

palp

Question 36

the middle part of the grasshopper's body that is divided into three parts

Answer 36

thorax

Question 37

the three parts of the thorax

Answer 37

prothorax (first section) mesothorax (middle legs and wings) metathorax (rear legs and wings)

Question 38

the grasshopper's locomotive center

Answer 38

thorax

Question 39

the rearmost portion of the grasshopper's body that contains the vital organs, including the heart, much of the digestive system, and most of the respiratory system and excretory system

Answer 39

abdomen

Question 40

minute respiratory openings in the segments of the abdomen

Answer 40

spiracles

Question 41

a single eardrum located on each side pf the first abdominal segment

Answer 41

tympanum

Question 42

order of digestion in insects

Answer 42

esophagus crop gizzard stomach colon rectum anus

Question 43

special enzymes produced by glands to help the stomach with digestion

Answer 43

gastric ceca

Question 44

serves as the insect's primary organ for absorbing nutrients

Answer 44

stomach

Question 45

the intestine of a grasshopper is composed solely of

Answer 45

colon rectum

Question 46

tubelike located in upper abdomen under exoskeleton

Answer 46

heart

Question 47

as the heart contracts, the blood travels forward into the extends into the insect's head

Answer 47

aorta

Question 48

blood reenters the heart through tiny openings long its sides called

Answer 48

ostia

Question 49

special organs that filter metabolic wastes serve as kidneys

Answer 49

Malpighian tubules

Question 50

where a grasshopper's eggs develop

Answer 50

two ovaries

Question 51

carries the eggs away from each ovary, two unite to form a single tube that opens near the tip of the female's abdomen

Answer 51

oviducts

Question 52

the female stores the male's sperm when they mate a specialized container where the sperm remain until the female is ready to lay her eggs

Answer 52

seminal receptacle

Question 53

a sharp-pointed, hard organ in which a female uses to dig a hole to lay her eggs

Answer 53

ovipositor